core/src/main/java/org/apache/oozie/command/SubmitTransitionXCommand.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.oozie.command;

import org.apache.oozie.client.Job;

/**
 * Base class for submit transition command. The derived class has to override these following functions:
 * <p>
 * loadState() : load the job's and/or actions' state
 * submit() : submit the job
 * notifyParent() : update the status to upstream if any
 */
public abstract class SubmitTransitionXCommand extends TransitionXCommand<String> {

    /**
     * The constructor for abstract class {@link SubmitTransitionXCommand}
     *
     * @param name the command name
     * @param type the command type
     * @param priority the command priority
     */
    public SubmitTransitionXCommand(String name, String type, int priority) {
        super(name, type, priority);
    }

    /**
     * The constructor for abstract class {@link SubmitTransitionXCommand}
     *
     * @param name the command name
     * @param type the command type
     * @param priority the command priority
     * @param dryrun true if dryrun is enable
     */
    public SubmitTransitionXCommand(String name, String type, int priority, boolean dryrun) {
        super(name, type, priority, dryrun);
    }

    /**
     * Submit the job
     *
     * @return the id
     * @throws CommandException thrown if unable to submit
     */
    protected abstract String submit() throws CommandException;

    @Override
    public void transitToNext() {
        if (job == null) {
            job = this.getJob();
        }
        job.setStatus(Job.Status.PREP);
        job.resetPending();
    }

    @Override
    protected String execute() throws CommandException {
        try {
            transitToNext();
            String jobId = submit();
            return jobId;
        }
        finally {
            notifyParent();
        }
    }
}